Resumo

SANTOS, Tony Meireles; VIANA, Bruno Ferreira  e  SA FILHO, Alberto Souza. Reliability of VO_2Max estimated in treadmill running by heart rate reserve and power output. Rev. bras. educ. fís. esporte [online]. 2012, vol.26, n.1, pp. 29-36. ISSN 1807-5509.  http://dx.doi.org/10.1590/S1807-55092012000100004.

The objective was to determine the reliability of the VO_2Max estimate on a treadmill using the measured (HR_peak) vs. the predicted (HR_predicted) maximum heart rate (HR). Eighteen men (27.5 ± 7.1 years, 73.7± 12.6 kg, 174.8 ± 10.2 cm) performed, in the first visit, a progressive test to determine the HR_peak. In the two following visits, submaximal aerobic tests were performed on a treadmill with a 6 min at 75% HR reserve. VO_2Max was estimated by means of the equations of HR, VO₂ reserve and the ACSM running equation. The intraclass correlation coefficient and the typical error of measurement using HRPredicted and HRpeak were 0.89, 2.43 ml.kg^-1.min^-1 (5%) and 0.83, 2.43 mL.kg^-1.min^-1 (4.9%), respectively. There was no significant difference (t test) between the estimates of VO2Max from the HR_peak and HR_predicted. The use of the HRpredicted was considered appropriate for VO_2Max estimation, with a small typical error of measurement.

Palavras-chave : Heart rate; Exercise test; Performance; Exercise tolerance; Aerobic.